Deuteronomy 4:10-13

10You stood before the Lord your God at Horeb and he said to me, “Assemble the people before me so that I can tell them my commands. Then they will learn to revere me all the days they live in the land, and they will instruct their children.”

11You approached and stood at the foot of the mountain, a mountain ablaze to the sky above it and yet dark with a thick cloud.

12Then the Lord spoke to you from the middle of the fire; you heard speech but you could not see anything – only a voice was heard.

13And he revealed to you the covenant he has commanded you to keep, the ten commandments, writing them on two stone tablets.